“And his disciples asked him, ‘Rabbi, who sinned, this man or his parents, that he was born blind?’ Jesus answered, ‘It was not that this man sinned, or his parents, but that the works of God might be displayed in him.”
(John 9:2-3 ESV) … in other words, “he was born blind” “that the works of God might be displayed in him.” Let that sink in. Jesus said this. God gave him life, with blindness, for an overarching purpose: His own glory, namely that Jesus might be shown and evidenced to be the Son of God, to the glory of the Father.